Miniature acoustic resonator-based filters and duplexers with cancellation methodology
US9871543B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 19, 2015 |
| Grant date | Jan 16, 2018 |
| Priority date | — |
| Expiry date | Feb 19, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/725
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A cancellation-based filter may have at least one frequency pass band and at least one frequency stop band. The cancellation-based filter may include a first group of one or more band pass filters, each having at least one acoustic resonator, the first group providing at least one frequency pass band for the cancellation-based filter; at least one hybrid coupler; and a second group of one or more band pass filters, each having at least one acoustic resonator, the second group coupled to at least one of the at least one hybrid couplers, wherein the at least one hybrid coupler and the second group of one or more band pass filters interact to provide at least one frequency stop band for the cancellation-based filter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.